# Life Sciences Grade 11 P1 Eastern Cape November 2024 Memo > Grade 11 Life Sciences Paper 1 memorandum from the Eastern Cape November Exam 2024 (English), 13 pages. Read online or download the free PDF. - Page: https://www.hlayiso.com/library/grade-11-life-sciences-2024-eastern-cape-november-exam-memorandum-paper-1-english/ce63f51c-4792-4920-b5d2-b6058acaf965 - Updated: 2026-09-28 - Subject: Life Sciences - Grade: Grade 11 - Language: English - Document type: Memorandum - Year: 2024 - Exam period: Eastern Cape November Exam - Paper: 1 - Curriculum: CAPS - Pages: 13 Breadcrumbs: [Home](https://www.hlayiso.com/) › [Library](https://www.hlayiso.com/library) › [Grade 11](https://www.hlayiso.com/library/grade-11) › [Life Sciences](https://www.hlayiso.com/library/grade-11/life-sciences) › [Life Sciences Grade 11 P1 Eastern Cape November 2024 Memo](https://www.hlayiso.com/library/grade-11-life-sciences-2024-eastern-cape-november-exam-memorandum-paper-1-english/ce63f51c-4792-4920-b5d2-b6058acaf965) ## About this document Life Sciences · Grade 11 · Eastern Cape November Exam · 2024 · English. Memorandum, 13 pages. Read online or download the PDF. Read it free online on the page above; download the PDF from there. ## Document text Text extracted from the PDF. Layout, diagrams and tables may not survive extraction. ### Page 1 NATIONAL SENIOR CERTIFICATE GRADE 11 NOVEMBER 2024 LIFE SCIENCES P1 FINAL AMENDED MARKING GUIDELINE MARKS: 150 This amended marking guideline consists of 13 pages. Hosted by www.ecexams.co.za. ### Page 2 2 LIFE SCIENCES P1 (EC/NOVEMBER 2024) PRINCIPLES RELATED TO MARKING LIFE SCIENCES 1. If more information than marks allocated is given Stop marking when maximum marks is reached and put a wavy line and ‘max’ in the right-hand margin. 2. If, for example, three reasons are required and five are given Mark the first three irrespective of whether all or some are correct/incorrect. 3. If whole process is given when only a part of it is required Read all and credit the relevant part. 4. If comparisons are asked for but descriptions are given Accept if the differences/similarities are clear. 5. If tabulation is required but paragraphs are given Candidates will lose marks for not tabulating. 6. If diagrams are given with annotations when descriptions are required Candidates will lose marks. 7. If flow charts are given instead of descriptions Candidates will lose marks. 8. If sequence is muddled and links do not make sense Where sequence and links are correct, credit. Where sequence and links are incorrect, do not credit. If sequence and links become correct again, resume credit. 9. Non-recognised abbreviations Accept if first defined in answer. If not defined, do not credit the unrecognised abbreviation, but credit the rest of the answer if correct. 10. Wrong numbering If answer fits into the correct sequence of questions but the wrong number is given, it is acceptable. 11. If language used changes the intended meaning Do not accept. 12. Spelling errors If recognisable, accept the answer, provided it does not mean something else in Life Sciences or if it is out of context. 13. If common names are given in terminology Accept, provided it was accepted at the national memo discussion meeting. 14. If only the letter is asked for but only the name is given (and vice versa) Do not credit. Copyright reserved Please turn over Hosted by www.ecexams.co.za. ### Page 3 (EC/NOVEMBER 2024) LIFE SCIENCES P1 3 15. If units are not given in measurements Candidates will lose marks. Marking guideline will allocate marks for units separately. 16. Be sensitive to the sense of an answer, which may be stated in a different way. 17. Caption All illustrations (diagrams, graphs, tables, etc.) must have a caption. 18. Code-switching of official languages (terms and concepts) A single word or two that appear(s) in any official language other than the learners’ assessment language used to the greatest extent in his/her answers should be credited if it is correct. A marker that is proficient in the relevant official language should be consulted. This is applicable to all official languages. Copyright reserved Please turn over Hosted by www.ecexams.co.za. ### Page 4 4 LIFE SCIENCES P1 (EC/NOVEMBER 2024) SECTION A QUESTION 1 1.1 1.1.1 D 🗸🗸 1.1.2 C 🗸🗸 1.1.3 B 🗸🗸 1.1.4 A 🗸🗸 1.1.5 A 🗸🗸 1.1.6 C 🗸🗸 1.1.7 A 🗸🗸 1.1.8 D 🗸🗸 1.1.9 C 🗸🗸 (9 x 2) (18) 1.2 1.2.1 Chloroplast 🗸 1.2.2 Intercostal 🗸 muscle 1.2.3 Ureter 🗸 1.2.4 Alveoli 🗸 1.2.5 (Palisade) mesophyll 🗸 / chlorenchyma / Palisade parenchyma 1.2.6 Photolysis 🗸 1.2.7 Pleural 🗸 membrane / pleura 1.2.8 Oxygen 🗸 1.2.9 Islets of Langerhans🗸 (9 x 1) (9) 1.3 1.3.1 B 🗸🗸 only 1.3.2 B ONLY 🗸🗸 1.3.3 BOTH A and B 🗸🗸 1.3.4 BOTH A and B 🗸🗸 / B ONLY (4 x 2) (8) 1.4 1.4.1 Trachea 🗸 (1) 1.4.2 - Part D/ diaphragm contracts 🗸 - increasing the volume of the thoracic cavity 🗸/ decreasing pressure in the thoracic cavity (2) 1.4.3 - The sides of the model is immovable 🗸 / in the human chest the rib cage moves upwards and downwards/ model cannot show contraction and relaxation of intercostal muscles - The space between the lungs and wall of the thorax is very small 🗸 / the model shows a large space between the balloons and glass jar - In the body there is limited movement of lungs 🗸 / pressure exerted on lungs / in the model there is a lot is of space available for lungs to move / greater pressure is placed on balloons - In the human body, the diaphragm is dome-shaped and flattensduring inhalation. 🗸 / In the model, the rubber sheet is flat and is pulled down to represent inhalation - Balloons are hollow/ one large sac / Lungs are not hollow / are made up of many small sacs - Lungs are not the same size - There is no capillary network/ transport system/ Human gaseous exchange system has transport system Any (2) (Mark first TWO only) Copyright reserved Please turn over Hosted by www.ecexams.co.za. ### Page 5 (EC/NOVEMBER 2024) LIFE SCIENCES P1 5 1.5 1.5.1 (a) Bronchus 🗸 (1) (b) Rib 🗸 (1) 1.5.2 • Well protected 🗸 The ribs and intercostal muscles protect the lungs from mechanical injury 🗸 • Large surface area 🗸 Many alveoli are present that increase surface area for gaseous exchange to take place 🗸 • Presence of a double pleural membrane provides protection against friction 🗸 • Has ventilation mechanism🗸/trachea and bronchi/breathing muscles(intercostal & diaphragm) allowing movement of air in and out🗸 (Any 2 x 2) (4) (Mark first TWO only) 1.5.3 (a) G 🗸 – Larynx 🗸 (2) (b) A 🗸 ‒ Trachea 🗸 / B 🗸 – bronchus 🗸 (2) [50] TOTAL SECTION A: 50 Copyright reserved Please turn over Hosted by www.ecexams.co.za. ### Page 6 6 LIFE SCIENCES P1 (EC/NOVEMBER 2024) SECTION B QUESTION 2 2.1 2.1.1 AMOUNT OF TIME IN SECONDS TO RELEASE 20 BUBBLES UNDER DIFFERENT COLOURS OF LIGHT Time taken to release 20 180 160 160 140 120 100 80 bubbles (sec) 80 60 40 40 20 0 Blue Green Red Colour of light Criteria Mark allocation Correct type of graph (T) 🗸 Caption of graph includes both variables (C) 🗸 Correct scale for y-axis and equal width of bars (S) 🗸 Correct labels on the x-axis and y-axis with correct unit on the y-axis (L) 🗸 Plotting of bars correctly done for: (P) 🗸 1‒2 bars 🗸 All 3 bars (6) Copyright reserved Please turn over Hosted by www.ecexams.co.za. ### Page 7 (EC/NOVEMBER 2024) LIFE SCIENCES P1 7 n 2.1.2 • Rate of oxygen bubble production indicates rate of photosynthesis 🗸 • Photosynthesis is responsible for plant growth 🗸/ accumulation of biomass OR • Oxygen bubble production indicates photosynthesis is occurring • Photosynthesis is responsible for growth in plants (2) 2.1.3 Green : Red 160 : 80 20:20 2 : 1 🗸🗸 Accept: 1: 1 🗸🗸 (2) 2.1.4 Blue 🗸 light (1) 2.2 2.2.1 • Space in the thoracic cavity would be limited 🗸 • Due to abdominal organs pushing into the thoracic cavity 🗸 • Limiting inhalation 🗸 / the ability of the lungs to fully expand OR • The thoracic cavity is no longer a closed system 🗸/ air will be pushed through the hole • When the diaphragm contracts the thoracic cavity will not expand 🗸/pressure will not decrease in the thoracic cavity • And inhalation is limited🗸/ less or no air will be drawn into the lungs (3) 2.2.2 • Due to difficulty in breathing 🗸/damaged diaphragm • Carbon dioxide in the blood increased 🗸/will not be exhaled effectively • Which was detected by (chemo) receptors of the aorta 🗸/ carotid artery • Which stimulated the Medulla Oblongata 🗸 • to send impulses to heart muscle 🗸 • to increase contraction the hearts muscle 🗸 (5) 2.3 2.3.1 To determine if living organisms require oxygen for aerobic respiration 🗸🗸 (2) 2.3.2 (a) Oxygen 🗸 uptake /aerobic respiration (1) (b) Presence or absence of living organisms 🗸 (1) 28−13 2.3.3 🗸 x 100 🗸 13 = 115,38% 🗸 (3) Copyright reserved Please turn over Hosted by www.ecexams.co.za. ### Page 8 8 LIFE SCIENCES P1 (EC/NOVEMBER 2024) 2.3.4 • Both flasks have the same amount of sodium hydroxide solution 🗸 • To ensure carbon dioxide absorption occurs equally in both flasks 🗸 OR • Both insect and glass beads have the same mass 🗸 • Therefore starting positions have the same pressure 🗸 OR • The control has all the same conditions 🗸 • except for the independent variable/ living organism 🗸 OR • Syringes contain same amount of air 🗸 • to ensure both beads and insects receive the same amount of oxygen 🗸 (Any 1 x 2) (2) (Mark first ONE only) 2.4 2.4.1 • Pyruvate/ pyruvic acid is broken down 🗸 • Releasing hydrogen 🗸 atoms and • carbon dioxide 🗸 • in the presence of oxygen 🗸 = • Small amount of energy / ATP is released 🗸 (Any 3 x 1) (3) 2.4.2 • In animal cells pyruvate/pyruvic acid is (partially) broken down into lactic 🗸 acid • due to lactic acid fermentation 🗸 • In plant cells pyruvate/pyruvic acid is (partially) broken down into ethanol and carbon dioxide 🗸 • due to alcoholic fermentation 🗸 (4) 2.4.3 • Alcoholic fermentation can be used to form alcohol 🗸 which can be sold for income 🗸 • It can be used to make bread dough rise 🗸 a greater volume of product is produced at a greater profit 🗸 (Mark first TWO only) (2X2) (4) 2.4.4 Muscle cramps 🗸 / spasms / fatigue (1) Copyright reserved Please turn over Hosted by www.ecexams.co.za. ### Page 9 (EC/NOVEMBER 2024) LIFE SCIENCES P1 9 2.5 2.5.1 • Light 🗸 intensity • Temperature 🗸 • Water 🗸/ rainfall • Humidity • Windspeed (Mark first TWO only) Any (2) 2.5.2 • (The light independent phase of) photosynthesis had been taking place 🗸 • This phase uses carbon dioxide to produce glucose 🗸 (2) 2.5.3 • Excess carbon dioxide would be a wasted expense 🗸 • Plants cannot use any more Carbon dioxide as plants would not be able to absorb beyond a set maximum 🗸/Chloroplasts could become saturated with carbon dioxide OR • Excess carbon dioxide could become toxic 🗸 for plant growth • May lead to the death of the plant 🗸 (Any 1 x 2) (2) 2.5.4 • Cellular respiration 🗸 would occur • Glucose is broken down 🗸 • in the presence of oxygen 🗸 • Carbon dioxide would be released 🗸 OR • Cellular respiration 🗸 would occur • Carbon dioxide would be released 🗸 • No photosynthesis would occur 🗸 as there is no light • No carbon dioxide is being absorbed 🗸 (4) [50] Copyright reserved Please turn over Hosted by www.ecexams.co.za. ### Page 10 10 LIFE SCIENCES P1 (EC/NOVEMBER 2024) QUESTION 3 3.1 3.1.1 (a) C 🗸 – Distal Convoluted Tubule 🗸/ B - collecting duct (2) (b) D 🗸 – Ascending limb of Henle 🗸 / loop of Henle (2) 3.1.2 - Capillary has microscopic pores 🗸 only allowing smaller components of blood through 🗸 - Dense capillary network 🗸/ cup shaped Bowman’s capsule Increasing surface area for filtration to occur 🗸 - Afferent arteriole wider than efferent arteriole 🗸 Placing blood under pressure within the glomerulus increasing filtration - Podocytes lining of Bowman’s capsule 🗸 form filtration slits 🗸 - Glomerulus in close contact to the Bowmans cavity 🗸 reducing distance to be moved by ultrafiltrate 🗸 - Thin endothelium (wall) that is semi-permeable 🗸 for easy absorption/movement of substances 🗸 (Mark first THREE only) (Any 3 x 2) (6) 3.1.3 (a) - Active reabsorption 🗸 - Energy/ATP produced by cuboidal epithelial cell used 🗸/pulling of glucose against the concentration gradient (2) (b) - Passive reabsorption /osmosis 🗸 - Water is moved from a region of high water potential to a region of low water potential 🗸 (2) 3.1.4 • More ADH produced 🗸 means • They/B and C/distal convoluted tubules and collecting duct become more permeable 🗸 • More water leaves the renal tubules 🗸 • More water reabsorbed into the blood 🗸/medulla Any (3) 3.2 3.2.1 Urea 🗸 (1) 3.2.2 • Proteins are too large 🗸 • To move through the pores of the glomerulus 🗸 (2) 3.2.3 • Less Aldosterone 🗸* will be secreted • causing the renal tubule to become le s s permeable to Na+ 🗸 • less sodium ions will be reabsorbed 🗸 from the filtrate Any (2) 3.2.4 • Diabetes 🗸 mellitus • High glucose level in the urine 🗸 • Insulin is not being produced 🗸/ is not effective, therefore no regulation (3) Copyright reserved Please turn over Hosted by www.ecexams.co.za. ### Page 11 (EC/NOVEMBER 2024) LIFE SCIENCES P1 11 3.3 3.3.1 (a) Liver 🗸 (1) (b) Rectum 🗸 (1) (c) Gall bladder 🗸 (1) 3.3.2 • Provides low pH / acidic conditions for enzymes to function 🗸/ chemical digestion • Kills bacteria 🗸/ pathogenic microbes (Mark first TWO only) (2) 3.3.3 • The small intestine is long 🗸 to increase the time/surface area for absorption of products 🗸 • The walls of the small intestine are folded 🗸 to increase surface area of absorption 🗸 • The inner wall of the small intestine has villi 🗸 to increase surface area of absorption 🗸 • Each villus contains microvilli 🗸 to further increase the surface area for absorption 🗸 • Good blood supply 🗸 • to maintain gradient for nutrient absorption 🗸 (Mark first TWO only) (Any 2 x 2) (4) 3.3.4 Liver 🗸 / A (1) 3.3.5 • Emulsification of fats 🗸 🗸 • Neutralisation of acidic chyme 🗸 🗸 (Mark first ONE only) (Any 1 x 2) (2) 3.3.6 Cross-section of the small intestine Remove – Microscopic structure not in CAPS. Mark out of 145 and convert to 150 (5) Copyright reserved Please turn over Hosted by www.ecexams.co.za. ### Page 12 Hosted by www.ecexams.co.za. ### Page 13 (EC/NOVEMBER 2024) LIFE SCIENCES P1 11 3.4 3.4.1 (a) • Glycerol and fatty acid tails 🗸 • C🗸 (2) (b) • Glucose 🗸 / monosaccharides • A🗸 (2) 3.4.2 (a) • Smaller surface area 🗸 • For the (re)absorption of nutrient monomers 🗸 • Due to less nutrients/glucose/amino acids/glycerol and fatty acids present in the blood 🗸 read in “takes longer time” to less nutrients • The individual’s body will not be able to sustain its nutritional needs 🗸/respiration/ energy/ metabolism – read into it • Person my get tired more often 🗸/ has less energy • Leading to health complications 🗸 / disease / infections (Any 4 x 1) (4) [50] TOTAL SECTION B: 100 GRAND TOTAL: 150 Copyright reserved Please turn over Hosted by www.ecexams.co.za. ## Related documents - [LIFE SCIENCES P2 GR11 QP NOV2024 ENG D](https://www.hlayiso.com/library/grade-11-life-sciences-2024-eastern-cape-november-exam-question-paper-paper-2-english/4eed64dd-0499-4ee7-97e7-817805e1413f) — Life Sciences · QP · 2024 · Eng - [LIFE SCIENCES P1 QP GR11 NOV2023 English](https://www.hlayiso.com/library/life-sciences-p1-qp-gr11-nov2023-english/42abdeff-1e61-42e2-8346-6702842e1486) — Life Sciences · QP · 2023 · Eng - [LIFE SCIENCES P1 MEMO GR11 NOV 2020 ENG](https://www.hlayiso.com/library/grade-11-life-sciences-2020-national-exemplar-november-exam-memorandum-paper-1-english/4be80ba9-620e-4bb0-a164-32a8e4a490f6) — Life Sciences · Memo · 2020 · Eng - [LIFE SCIENCES P1 MEMO GR11 NOV 2020 ENG D](https://www.hlayiso.com/library/grade-11-life-sciences-2020-national-exemplar-november-exam-memorandum-paper-1-english/6cd43276-28e4-442a-b653-a59c059738ca) — Life Sciences · Memo · 2020 · Eng - [LIFE SCIENCES P1 MEMO GR11 NOV 2018 English](https://www.hlayiso.com/library/life-sciences-p1-memo-gr11-nov-2018-english/c0369b9e-1cbf-4b20-aa0e-f5763f7e8b4a) — Life Sciences · Memo · 2018 · Eng - [LIFE SCIENCES P1 GR11 MEMO NOV2017 English](https://www.hlayiso.com/library/life-sciences-p1-gr11-memo-nov2017-english/65c6edb8-e5bf-4f1a-bd90-7583c65f4c8e) — Life Sciences · Memo · 2017 · Eng ## More from Grade 11 Life Sciences - [Gr 11 Life Sci ATP 2023-24](https://www.hlayiso.com/library/gr-11-life-sci-atp-2023-24/4ab88214-8173-4f6e-98ea-ab509ada756b) — ATP - [LIFE SCIENCES P2 QP GR11 NOV 2025 ENG watermark](https://www.hlayiso.com/library/life-sciences-p2-qp-gr11-nov-2025-eng-watermark/0249505b-9116-4f42-870c-e7cabeed0f37) — QP · 2025 · Eng - [KZN Life Sciences Grade 11 June 2025 QP and Memo](https://www.hlayiso.com/library/kzn-life-sciences-grade-11-june-2025-qp-and-memo/31a59d87-a46a-4536-91d0-2fe1264e946a) — QP + Memo · 2025 - [EC Life Sciences Grade 11 June 2024 QP and Memo](https://www.hlayiso.com/library/ec-life-sciences-grade-11-june-2024-qp-and-memo/68ed48c4-d02f-4f7f-97fb-736190106d11) — QP + Memo · 2024 - [KZN Life Sciences Grade 11 June 2024 QP and Memo](https://www.hlayiso.com/library/kzn-life-sciences-grade-11-june-2024-qp-and-memo/16f6b3c9-ef72-40fd-8904-5ab062f8ed6e) — QP + Memo · 2024 - [LIFE SCIENCES P2 GR11 QP NOV 2023 English](https://www.hlayiso.com/library/life-sciences-p2-gr11-qp-nov-2023-english/15b2ac0d-8e6c-483d-812f-8569df89469b) — QP · 2023 · Eng ## Collection - [Grade 11 past papers](https://www.hlayiso.com/grade-11/past-papers) --- Hlayiso: free CAPS and IEB past papers, memos, notes and study guides for South African learners. 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